refracted wave 中文意思是什麼
refracted wave
解釋
折射波-
However, the radio wave can then reflect back of the earth and become refracted again to return earthwards once more. this can sometimes occur a number of times with little attenuation but some fading
在雷達探測中可以利用此方法，初步確定雷達回波中哪個地區會出現陷獲折射回波，為進一步分析從雷達回波反演大氣層結提供了可能。 -
Application of preliminary refracted wave static correction technique in complicated area seismic data processing
初至折射波靜校正技術在復雜探區地震數據處理中的應用 -
This article describes a way of special ultrasonic system which monitors thermal stress in seamless welded rails. this monitoring system is a non destructive testing system, which adopts avr mcu and high - precise time chip processing as the core of it, and adopts the critically refracted longitudinal wave as the object of measuring. my studying focuses on the theory of the monitoring system, which will be listed in this arctile : according to the snell theory, the theory of motivating of critically refracted longitudinal wave is described in details, and the finite element software is used to emulate the propagating course. the formulas of calculating the pts of swr are taken from the acoustoelasticity theory, and the calculating the parameters is introduced. according to assemble materials, three kinds of ways of monitoring the pts of swr using critically refracted longitudinal wave are described, which are measuring the sound - time in changeless distance, ultrasonic critical - angle refractomery and frequency spectrum, the first way of ways is used in this experiment system. the factors, which effect the monitoring system, are assaid in some degree based
本文的研究工作重點在無縫焊接鋼軌溫度應力測量系統的理論模塊，包括根據snell原理，研究極限折射縱波的激發機理，並使用有限元軟體ansys進行模擬;根據聲彈性理論以及公式推導出計算無縫焊接鋼軌中的溫度應力的公式，並對其中參數的求解方法進行介紹;根據收集的資料，介紹了三種使用極限折射縱波測量無縫焊接鋼軌溫度應力的方法，即固定距離測量聲時法、臨界角折射法和頻譜分析法，本實驗系統使用的是第一種;根據實驗經驗以及相關資料，分析了影響極限折射縱波測量溫度應力的幾個因素，並提出了相應的解決方法;根據實驗系統的需要，獨立設計並加工出相關配套的實驗設備，包括實驗鋼塊、有機玻璃楔塊、固定件、載荷外框裝置等。 -
Also, any negatively refracted wave would be rapidly smeared out in only a few wavelengths by dispersion, which valanju maintains will always be a major problem in a negative index material
此外，負折射波將在幾個波長內因色散而快速衰減，瓦藍朱認為這將是負折射率材料最大的問題。 -
Numerical results show that if appropriate delay times of sources are exerted on elements of phased array, direction of acoustic beam radiated from the phased array can be steered so that the refracted compressional wave and the refracted shear wave can be excited effectively
結果表明，只要在相控線陣的各陣元之間施加合適延遲時間的激勵信號，就可以調整輻射器的輻射聲束的方向，以有利於激發滑行縱波和滑行橫波；只要採用相對較低的頻率或使用加權相控線陣，就可以增大相控線陣的輻射主瓣角寬，以利於在任意地層有效激勵滑行縱波。 -
Application of reversed refracted wave method in detecting the thickness of remained coal seam
相遇折射波法在剩餘煤厚探測中的應用 -
Based on the stress measurement model using the critically refracted longitudinal ( lcr ) wave, this paper discussed the key techniques of measuring the stress in accessories, which includes the generation, receiving and afterwards management of lcr wave. an experimental stress measurement system based on time was also designed and constructed in this project, by measuring the travel time of lcr wave in the medium, the stress state of testing object can be well evaluated
本文基於臨界折射縱波（ criticallyrefractedlongitudinal ， lcr ）應力測量模型，研究採用lcr波測量零件中切向應力的關鍵技術，包括lcr波的產生、接收和后續處理，設計並製作了基於傳播聲時的應力檢測實驗系統，通過測量lcr波在材料內部傳播聲時的改變，評估被測物體中的應力情況。
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